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6. Other than phytomining, which of the following is another way to extract copper from low grade ores?
- Smelting
- Electrolysis
- Bioleaching
- Displacement
7. What is the problem with extracting copper from ores?
- Copper rich ores are running out
- It is expensive
- It requires a lot of work
- It cannot be done
8. In phytomining, what must is grown and burned in copper ore?
- Plants
- Bacteria
- Fungus
- Miley Cyrus
9. What is one of the disadvantages of electrolysis
- It doesn't always work
- It is expensive
- It is a difficult process
- It is a waste of time